Zenitco B-71 Joker-1 Upper Picatinny Handguard
- $269
Available Options
In short: The Zenitco B-71 Joker-1 is the documented upper component of the Joker-1 handguard system for the AR-15 platform. It provides a continuous top Picatinny rail and attaches to the matching B-81 lower component with four screws.
Compatibility checkpoint
B-71 is designed for the Joker-1 configuration and pairs with the B-81 Joker-1 lower handguard. The manufacturer describes installation as a system procedure involving its matching lower component, mounting nut and compatible adjustable gas block. It is not documented as a drop-in upper for an otherwise standard setup.
Purpose and interface
The one-piece upper component replaces the standard upper handguard position and adds a Picatinny rail aligned with the receiver rail when the complete system is fitted correctly. Its open construction supports airflow around the assembly.
Technical specifications
| Documented platform | AR-15 with the matching Joker-1 system components |
|---|---|
| Material | D16T aluminum alloy, one-piece milled construction |
| Interface | Continuous top Picatinny rail |
| Weight | 79 +3 g |
| Dimensions | 187 × 39 × 38 mm |
| Operating range | −50°C to +50°C |
| Manufacturer warranty | 60 months |
| Color | Black |
What's in the Box
- B-71 Joker-1 upper handguard — 1
- Mounting screws — 4
Installation note
Installation requires disassembly and precise alignment of the complete Joker-1 interface. The official sequence positions the lower component first, aligns the upper Picatinny surface with the receiver rail, then secures B-71 to B-81 with four screws. Professional installation is recommended when the full interface is not already confirmed.
Frequently asked questions
Is B-71 a complete handguard system?
No. It is the upper Joker-1 component and is documented with the matching B-81 lower component and related mounting parts.
Which lower component matches B-71?
The manufacturer documents the B-81 Joker-1 lower handguard.
What accessory interface does it provide?
A continuous top Picatinny rail.
How is B-71 attached to B-81?
The official installation sequence uses four screws after the upper component is seated in the lower component's grooves.
General
Mounting & Rails
Kit Contents
Care & Chemicals
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